Author Affiliations
Abstract
1 Shaanxi University of Science and Technology, School of Electronic Information and Artificial Intelligence, Xi’an, China
2 University College London, Department Physics and Astronomy and London Centre for Nanotechnology, London, United Kingdom
3 Shaanxi University of Science and Technology, School of Electrical and Control Engineering, Xi’an, China
4 Changzhou University, School of Microelectronics and Control Engineering, Changzhou, China
5 Shanghai University, Ministry of Education, Key Laboratory of Advanced Display and System Applications, Shanghai, China
Visible light communication (VLC) is an emerging technology employing light-emitting diodes (LEDs) to provide illumination and wireless data transmission simultaneously. Harnessing cost-efficient printable organic LEDs (OLEDs) as environmentally friendly transmitters in VLC systems is extremely attractive for future applications in spectroscopy, the internet of things, sensing, and optical ranging in general. Here, we summarize the latest research progress on emerging semiconductor materials for LED sources in VLC, and highlight that OLEDs based on nontoxic and cost-efficient organic semiconductors have great opportunities for optical communication. We further examine efforts to achieve high-performance white OLEDs for general lighting, and, in particular, focus on the research status and opportunities for OLED-based VLC. Different solution-processable fabrication and printing strategies to develop high-performance OLEDs are also discussed. Finally, an outlook on future challenges and potential prospects of the next-generation organic VLC is provided.
organic light-emitting diode visible light communication printable vehicular applications internet of things Advanced Photonics Nexus
2023, 2(4): 044001
Author Affiliations
Abstract
1 School of Electrical and Control Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
2 School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
Inorganic perovskite solar cells (IPSCs) have attained attention due to their excellent thermal and phase stability. In this work, we demonstrate a novel approach for fabricating IPSCs, using the strategies of interface passivation and anti-solvent before spin-coating perovskite. Poly(methyl methacrylate) (PMMA) and chlorobenzene (CB) are used as passivator and anti-solvent, respectively. The CB improves the perovskite crystal morphology. Meanwhile, PMMA passivates the defects between poly(3, 4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT: PSS) and perovskite layer, thus increasing the short-circuit current. Excitingly, we find that PMMA benefits the grain boundaries (GBs) of perovskite, which makes it more humidity-resistant, increasing the stability of perovskite film. Especially, PMMA mitigates interfacial charge losses, and the devices based on CsPbI3-xBrx passivated by PMMA exhibit the power conversion efficiency (PCE) much higher than those based on pure CsPbI3-xBrx.
光电子快报（英文版）
2022, 18(6): 338
陕西科技大学 电气与信息工程学院, 西安 710021
研究了碳酸铯(Cs2CO3)作为电子注入层对蓝光有机电致发光器件性能的影响。结果表明,与常用的LiF/Al结构相比, Cs2CO3/Al结构的电子注入能力更强。对Cs2CO3电子注入层的厚度进行了优化, 表明Cs2CO3厚度为1.5nm时, 器件的发光效率和功率效率有很大提高,在较低电流密度(13.2mA/cm2)下即达到其最大发光效率(3.04cd/A), 分析得到真空蒸镀Cs2CO3能够有效提高电子注入的机理: 低功函的金属Cs起到了克服肖特基势垒、增强电子注入的作用。
有机电致发光器件 碳酸铯 电子注入层 organic light emitting diodes cesium carbonate electron injection
1 陕西科技大学1.材料科学与工程学院
2 陕西科技大学2.电气与信息工程学院, 西安710021
制作了一种以Al为金属反射膜和金属半透膜的微腔有机电致发光器件(OLED)。器件结构是：Al/MoO3/NPB/ADN∶TBPe∶DCJTB/Alq3/LiF/Al。设计了五种厚度的金属Al阳极半透膜器件, Al半透膜的厚度依次为：12nm, 13nm, 14nm, 15nm, 16nm。通过调节阳极Al半透膜的厚度, 改变微腔的光学长度, 研究微腔效应对器件性能的影响。利用Al半透膜阳极厚度的变化, 调整微腔器件的光学长度, 发光效率和色纯度也随之变化。当Al半透膜为12nm时, 器件在11V获得最高亮度3381cd/m2, 最高效率为2.01cd/A, 色坐标为(0.33,0.39)。实验表明, 合理利用微腔效应, 可提高以Al为阳极器件的色纯度, 并保持一定的发光效率。
有机电致发光器件 复合阳极 色坐标 微腔器件 organic lightemitting diode composite anode color coordinate microcavities device
1 陕西科技大学 材料科学与工程学院，西安 710021
2 西安高技术研究所，西安 710025
制备了以Al /MoO3为复合阳极的有机电致发光器件，其结构为：Al/MoO3/NPB/Alq3∶C545T(x%)/Alq3/LiF/Al。比较了不同掺杂浓度条件下OLED器件的电致发光特性。当C545T掺杂浓度为8%时，主客体间的能量转移最充分，器件的启亮电压为2.75V，器件在13V时获得最高亮度为27000cd/m2，发光效率为6.97cd/A。用FowlerNordheim隧道效应理论和载流子注入机制，分析了以Al /MoO3为复合阳极的OLED器件性能。
有机电致发光器件 复合阳极 掺杂 organic lightemitting diode composite anode doping
School of Electric and Information Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
Frontiers of Optoelectronics
2010, 3(4): 387
